Seiko Cal. 6646 - 632

This Solar model from 1972 features a 37mm Titanium case. Powered by the 6646 caliber with 36j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-0fe64b2e099f]

Also known as: World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1972

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